Windows PowerShell 3.0Some of the new features in Windows PowerShell 3.0 include:

Workflow Windows PowerShell Workflow lets IT Pros and developers apply the benefits of workflows to the automation capabilities of Windows PowerShell. Workflows allow administrators to run long-running tasks (which can be made repeatable, frequent, parallelizable, interruptible, or restart-able) that can affect multiple managed computers or devices at the same time.

Disconnected Sessions PowerShell sessions can be disconnected from the remote computer and reconnected later from the same computer or a different computer without losing state or causing running commands to fail.

Robust Session Connectivity Remote sessions are resilient to network failures and will attempt to reconnect for several minutes. If connectivity cannot be reestablished, the session will automatically disconnect itself so that it can be reconnected when network connectivity is restored.

Scheduled Jobs Scheduled jobs that run regularly or in response to an event.

Delegated Administration Commands that can be executed with a delegated set of credentials so users with limited permissions can run critical jobs

Simplified Language Syntax Simplified language syntax that make commands and scripts look a lot less like code and a lot more like natural language.

Cmdlet Discovery Improved cmdlet discovery and automatic module loading that make it easier to find and run any of the cmdlets installed on your computer.

Show-Command Show-Command, a cmdlet and ISE Add-On that helps users find the right cmdlet, view its parameters in a dialog box, and run it.

WMIWMI in Windows Management Framework 3.0 introduces:

A new provider development model This new model brings down the cost of provider development and removes the dependency on COM.

A new MI Client API to perform standard CIM operations. The API can be used to interact with any standard WsMan + CIMOM implementation, allowing management applications on Windows to manage non-Windows computers.

Connections are more robust Remote connections communicating over WinRM are more robust to transient network failures such as a flaky WAN connection. In the case of a complete network failure, connections are gracefully disconnected and can be reconnected when network connectivity is restored.

Remoting is more Standards-compliant Standard WS-Management operations, including Create and Delete, can be performed over WMI. Remoting for cmdlets written in native code using the new WMI provider development model uses WS-Management instead of DCOM.

Multiple PowerShell sessions can be shared in the same process PowerShell sessions from the same user to the same session configuration (WinRM plug-in) can run in a single shared process instead of separate processes. This improves scalability and performance by allowing multiple sessions to share memory and other server resources.

Management OData IIS ExtensionsManagement OData IIS Extension enables an administrator to expose a set of PowerShell cmdlets as a RESTful web endpoint accessible via the Open Data Protocol (OData). This enables Windows and non-Windows clients to discover and invoke PowerShell cmdlets remotely over standard web protocols and interfaces.